横坐标为负,纵坐标为零的点在( )
在一幅地图上,量得银川至中卫的直线距离为7.2厘米,两地实际直线距离为144千米,这幅图的比例尺是( )
— The summer holiday is on the way. We'll have more freedom.
— . But we should learn to manage ourselves.